Question

Write the slope-intercept (y = mx + b) form of the equation from the information given.
The line goes through the points (-1, -7) and (9, -2)
So I need help... can someone try to show me how to do this?

Answer 1

first you have to find slope through formula
m=\frac{{y2 - y1}}{{x2 - x1}}
here x1= -1,y1=-7,x2=9,y2=-2
put the values in equation

Answer 2

\[\frac{{y2 - y1}}{{x2 - x1}}\]

Answer 3

you will get 5/10 =1/2
so slope is 1/2
now
y-y1=m(x-x1)
y+7=1/2(x+1)
y+7=1/2x+1/2
y=1/2x+1/2-7

Answer 4

\[y = \frac{1}{2}x - \frac{{13}}{2}\]

Answer 5

so that's the equation ?

Answer 6

yup

Answer 7

oh ok, thank you!!! soo much! haha you make me smile :) (username pun)

Answer 8

hahaha u r welcome :)